123951-96-2 AIDS-001230 AIDS001230 Butanamide, L-2-aminobutanoyl-L-2-aminobutanoyl-L-asparaginyl-L-tyrosyl-L-2-amino- H-.alpha.-Aminobutyric acid-.alpha.-Aminobutyric acid-Asn-Tyr-.alpha.-Aminobutyricacid-NH2 H-Abu-Abu-Asn-Tyr-Abu-NH2